Threshing-machine.



L l Patented Aug, I4, i900. A. N. THnMAs L .L CALDWELL.

THRESHING IIIACHINET (Appncation med oec. 31, 1899.

(No Mdel.)

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nTTnn STATES PATENT "Orricn.

ALBERT N. THOMAS AND JOHN CALDWELL, OF AVALON, MISSOURI.

THREsl-uno-MACHINE.

SPECIFICATION formngrpart of Letters Patent No. 655,915, dated August 14, 1900.

Application led October 3l, 1899.4 Serial No. 735,405. (No model.)

To all whom it may concern:

Be it known that we, ALBERT N. THOMAS and JOHN CALDWELL, citizens of the United States, residing at Avalon, in the county of Livingston and State of Missouri, have invented certain new and useful Improvements in Threshing-Machines, of which the following is a specification.

Our invention relates to threshingmachines, and particularly to grain-separators, and has for its object to prevent the choking or clogging of the sieve by particles of straw or weed falling perpendicularly on such sieve by causing such particles to fall horizontally or at an angle on the sieve. This object we accomplish in the manner and by the means hereinafter more fully described in detail and particularly pointed out in the claim, reference being had to the accompanying drawings, in which like letters indicate like parts in all the views.

Figure l is a perspective view of our invention. Fig. 2 is a like view of the perforated extension of a grain-pan with-our invention attached. Fig. 8 is a longitudinal vertical section.

Our invention consists of the inclined shelves A, secured at their ends to the side pieces B of a frame B, so that the upper edge of one shelf will be immediately over the lower edge of the preceding shelf, leaving a verticall opening C between the upper edge of the one and the lower edge of the other, varying ac'- cording to the pitch and width of the shelves A. Said shelves A incline rearwardly and downwardly in the direction of the ow of the straw, weeds, or other material passing over the same and direct or deliver said straw to the sieve in a horizontal position, or at least at an angle to the perpendicular. The rearward and downward inclination of the shelves A also serves to prevent the clogging of the sieve G bygiving an impulse rearwardly to' the course of the material as it passes over the shelves and descends to said sieve. The side pieces B are adapted to be secured to the sides of the perforated extension D of the grain-pan E, so that the shelves A will extend across under such perforated extension D and receive what falls from such extension D.

F is a shoe arranged to operate in usual manner, and G an inclined sieve in said shoe, which is adapted to receive the particles of strawwand weeds from the inclined shelves of the frame B. I

The operation of our invention is as follows: The grain, accompanied by the chaff and particles of straw and weeds, falls through the perforations of the extension D on the shelves A and passes down the inclined surfaces of such shelves A to the openings C, through which the particles of straw and weed pass in a horizontal position, or at least at an angle to the perpendicular, thus lessening the chance of their sticking in the meshes of the sieve G and choking or clogging it. i

Having thus described our invention, what we claim as new, and desire to secure lby Letters Patent, is-

In a threshing-machine, a grain-pan with a perforated extension, a detachable frame adapted to be carried on the under `side of said extension, and having a series of imperforate shelves inclined rearwardly and downwardly in the direction of flow of material passing over the same, substantially as shown and described.

In testimony whereof we hereto altix our signatures in the presence of two witnesses.

ALBERT N. THOMAS. JOHN CALDWELL. lVitnesses:

J UNIUs ELERNE, J r., DAVID GAIN. 

